Why isn't fire being loaded in the render view?
Your material setup is very awkward. Some things seem outright incorrect, like a color ramp being driven by color and then controlling emission strength. Start off with a default Principled BSDF, changing only the Color Attribute field from the default blank to the word color (uncapitalized).
For a custom flame color, perhaps use a plain emission shader, with the density attribute controlling the strength, and the temperature attribute going into a color ramp that starts with black. You may have to use a remap node so the temperature value so it ends up being 0 to 1.